Brake for rail vehicles



Auge

L. SAIVES BRAKE FOR RAIL VEHICLES Filad Jl-1ne 11, 1924 2 Sheets-Sheet 1Waff/Vga Aug. 31 1926;

L. SAIVES BRAKE FOR RAIL VEHICLES APatented Aug. 31, 1926.

STATES 1 Laon selvas, or im.LAnooUiar,

FICE.

BILLANCUURT, CE.

BRAKE FOR RAIL VEHICLES.

Application lecl June 11, 1924, Serial No.

The invention relates to Aa brake mechanism, especially adapted torailway vehicles, and has for its object to provide a simple,l durable,and efficient brake'of the drum and interior expansible shoe type to beapplied to the outer face of a carwheel, as will be more particularlydescribed in the following specification and the accompanying ldrawings,in whichz- Fig. 1 is a transverse sectional elevation on the line A-B ofFig. 2.

Fig. 2 is a side elevation.

Fig. 3 is a sectional elevation on the line l-F of Fig. 2.

Fig. 4 is a sectional side elevation of the wheel and brake.

Referring to the figures, the driving wheel to which the arrangement isapplied is shown at 1, and is integral with the driving shaft 2 of thevehicle, which is journalled in a housing 3 attached to the vehicleframe 4 by springs 5.

'-llhe braking arrangement, attached outside the wheel 1`, comprises thefollowln members: on the wheel disc there is rivete the brake-drum 6, onthe inner periphery of which the brake-segments `7--7 (Fig. 4) areapplied as usual. rlhe studs 8-8 of the seg ments, as well as the axleof the control-cam 12, are attached to a member 9 centered on the outerpart of the wheel-boss 1, a ball bear-ing 11 being provided between theboss and a concentric cylindrical member 10 in-v tegral with 9.

'lhe member 9 of circular shape comprises a central part 9',constituting a cap for'the boss, cast integrally therewith anddisposedon opposite sides ofthe center thereof are provided ribbed supports 14',between which are located the sleeve-shapedends of the strut 14; each ofthese supports is perpendicular to the aXis of the shaft 2, and they aretraversed. together with the ends of the strut, by pivot bolts 15,. i

' The strut 14 because of this method of attachment constitutes a.jointed fork; at. its

719,302, and in France September 9, 1923.

opposite end the strut. is attached to the frame4 by special doubleshackles 18, the upper pin 19 of which is hung to a suitable bracket 20,rigidly fixed to the frame 4. Th1s joint 19 -is straight and practicallyparallel with the axle; the lower joint on the contrary is of the balland socket type and comprises the pin 21, the spherical caps 28 and thecorresponding ball 22; felt washers 24 complete the ball and socketjoint. t At a suitable place in the strut 14 'there 1s made an aperture16, through which the shaft .controlling the operating earn 12 canpass', said shaft being keyed to the controllever 17, connected to thepull-rod 17.

Considering the operation of the device it is evident `(1) that when thebrakes are operated, the member 9 centered on the boss of the wheel willnot rotate owing. to its connection with the strut 14; (2) that thisstrut will be able easily, and without giving rise to abnormal strains,to follow all displacements of the axle with respect to the frame inconsequence of the joints described; the ball and socket joint at thelower part, of the double shackles 18 allowing displacements as shown bythe arrows C.

l claim as my invention- A railway car wheel brake comprising a brakedruin adapted to be xed to the outer edge of the wheel web, a circularframe loosely mounted on the outer portion of the wheel hub,circumferentially expansible brake shoes within the drum pivot pins forsaid shoes carried by said rame, a shoe operating cam carried by saidframe, means for operating said cam, a forked strut, vertically disposedhinged connections between the forks of said strut at diametricallyopposite points on the outer face of said frame,

and a shackle including a universal joint for connecting the outer endsof with the vehicle frame. y In testimony whereof I ax my signature.

LEON sAIvEs.`

the strut

